package com.dragon.www.smarthome.view;

import android.content.Context;
import android.graphics.Bitmap;
import android.graphics.BitmapFactory;
import android.graphics.Canvas;
import android.graphics.Matrix;
import android.graphics.Paint;
import android.graphics.Rect;
import android.util.AttributeSet;
import android.view.MotionEvent;
import android.view.View;
import android.view.View.OnTouchListener;

import com.dragon.www.smarthome.R;


public class SlipButton extends View implements OnTouchListener {
	private boolean NowChoose = false;// 记录当前按钮是否打开,true为打开,flase为关闭

	private boolean isChecked;

	private boolean OnSlip = false;// 记录用户是否在滑动的变量

	private float DownX, NowX;// 按下时的x,当前的x

	private Rect Btn_On, Btn_Off;// 打开和关闭状态下,游标的Rect .

	private boolean isChgLsnOn = false;

	private OnChangedListener ChgLsn;

	private Bitmap bg_on, bg_off, slip_btn;

	private long clickTime = 0;

	public SlipButton(Context context) {
		super(context);
		init();
	}

	public SlipButton(Context context, AttributeSet attrs) {
		super(context, attrs);
		init();
	}

	public SlipButton(Context context, AttributeSet attrs, int defStyle) {
		super(context, attrs, defStyle);
		init();
	}

	private void init() {// 初始化
		bg_on = BitmapFactory.decodeResource(getResources(), R.drawable.split_left_1);
		bg_off = BitmapFactory.decodeResource(getResources(), R.drawable.split_right_1);
		slip_btn = BitmapFactory.decodeResource(getResources(), R.drawable.split_1);
		Btn_On = new Rect(0, 0, slip_btn.getWidth(), slip_btn.getHeight());
		Btn_Off = new Rect(bg_off.getWidth() - slip_btn.getWidth(), 0, bg_off.getWidth(), slip_btn.getHeight());
		setOnTouchListener(this);// 设置监听器,也可以直接复写OnTouchEvent
	}

	@Override
	protected void onDraw(Canvas canvas) {// 绘图函数

		super.onDraw(canvas);
		Matrix matrix = new Matrix();
		Paint paint = new Paint();
		float x;
		if (NowX < (bg_on.getWidth() / 2)) {
			x = NowX - slip_btn.getWidth() / 2;
			canvas.drawBitmap(bg_off, matrix, paint);// 画出关闭时的背景
		} else {
			x = bg_on.getWidth() - slip_btn.getWidth() / 2;
			canvas.drawBitmap(bg_on, matrix, paint);// 画出打开时的背景
		}

		if (OnSlip) {// 是否是在滑动状态,
			if (NowX >= bg_on.getWidth())// 是否划出指定范围,不能让游标跑到外头,必须做这个判断
				x = bg_on.getWidth() - slip_btn.getWidth() / 2;// 减去游标1/2的长度...
			else if (NowX < 0) {
				x = 0;
			} else {
				x = NowX - slip_btn.getWidth() / 2;
			}
		} else {// 非滑动状态
			if (NowChoose) {// 根据现在的开关状态设置画游标的位置
				x = Btn_Off.left;
				canvas.drawBitmap(bg_on, matrix, paint);// 初始状态为true时应该画出打开状态图片
			} else
				x = Btn_On.left;
		}
		if (isChecked) {
			canvas.drawBitmap(bg_on, matrix, paint);
			x = Btn_Off.left;
			isChecked = !isChecked;
		}

		if (x < 0)// 对游标位置进行异常判断...
			x = 0;
		else if (x > bg_on.getWidth() - slip_btn.getWidth())
			x = bg_on.getWidth() - slip_btn.getWidth();
		canvas.drawBitmap(slip_btn, x, 0, paint);// 画出游标.

	}

	public boolean onTouch(View v, MotionEvent event) { // 根据动作来执行代码
		switch (event.getAction()) {
		case MotionEvent.ACTION_MOVE:// 滑动
			NowX = event.getX();
			break;

		case MotionEvent.ACTION_DOWN:// 按下
			clickTime = System.currentTimeMillis();
			if (event.getX() > bg_on.getWidth() || event.getY() > bg_on.getHeight())
				return false;
			OnSlip = true;
			DownX = event.getX();
			NowX = DownX;
			break;

		case MotionEvent.ACTION_CANCEL: // 移到控件外部
			OnSlip = false;
			boolean choose = NowChoose;
			if (NowX >= (bg_on.getWidth() / 2)) {
				NowX = bg_on.getWidth() - slip_btn.getWidth() / 2;
				NowChoose = true;
			} else {
				NowX = NowX - slip_btn.getWidth() / 2;
				NowChoose = false;
			}
			if (isChgLsnOn && (choose != NowChoose)) // 如果设置了监听器,就调用其方法..
				ChgLsn.OnChanged(NowChoose);
			break;
		case MotionEvent.ACTION_UP:// 松开
			OnSlip = false;
			boolean LastChoose = NowChoose;
			if (event.getX() >= (bg_on.getWidth() / 2)) {
				NowX = bg_on.getWidth() - slip_btn.getWidth() / 2;
				NowChoose = true;
			} else {
				NowX = NowX - slip_btn.getWidth() / 2;
				NowChoose = false;
			}
			if (isChgLsnOn) {
				if (LastChoose != NowChoose) {
					ChgLsn.OnChanged(NowChoose);
				}else{
					long time = (System.currentTimeMillis() - clickTime) ;
					if(time/1000<1){
						if(!NowChoose){
							NowX = bg_on.getWidth();
						}else{
							NowX = -bg_on.getWidth();
						}
						ChgLsn.OnChanged(!NowChoose);
					}
				}
			}
			clickTime = 0;
			break;
		default:
			break;
		}
		invalidate();// 重画控件
		return true;
	}

	public void SetOnChangedListener(OnChangedListener l) {// 设置监听器,当状态修改的时候
		isChgLsnOn = true;
		ChgLsn = l;
	}

	public interface OnChangedListener {
		abstract void OnChanged(boolean CheckState);
	}

	public void setCheck(boolean isChecked) {
		this.isChecked = isChecked;
		NowChoose = isChecked;
	}
}
